(gdb) bt full
#0  0x00000000004e5d63 in ?? ()
No symbol table info available.
#1  0x00000000004e666f in ?? ()
No symbol table info available.
#2  0x00000000004e6302 in ?? ()
No symbol table info available.
#3  0x00000000004e7add in ?? ()
No symbol table info available.
#4  0x00000000004e8b3c in ast_localtime ()
No symbol table info available.
#5  0x00007fd1e71926df in ?? () from /usr/lib64/asterisk/modules/app_voicemail.so
No symbol table info available.
#6  0x00007fd1e71a0069 in ?? () from /usr/lib64/asterisk/modules/app_voicemail.so
No symbol table info available.
#7  0x00007fd1e71a1941 in ?? () from /usr/lib64/asterisk/modules/app_voicemail.so
No symbol table info available.
#8  0x00000000004af97e in pbx_exec ()
No symbol table info available.
#9  0x00000000004b9ad9 in ?? ()
No symbol table info available.
#10 0x00000000004b9f60 in ast_spawn_extension ()
No symbol table info available.
#11 0x00007fd1e7dc3913 in ?? () from /usr/lib64/asterisk/modules/app_macro.so
No symbol table info available.
#12 0x00000000004af97e in pbx_exec ()
No symbol table info available.
#13 0x00000000004b9ad9 in ?? ()
No symbol table info available.
#14 0x00000000004b9f60 in ast_spawn_extension ()
No symbol table info available.
#15 0x00007fd1e7dc3913 in ?? () from /usr/lib64/asterisk/modules/app_macro.so
No symbol table info available.
#16 0x00000000004af97e in pbx_exec ()
No symbol table info available.
#17 0x00000000004b9ad9 in ?? ()
No symbol table info available.
#18 0x00000000004bb6cc in ?? ()
No symbol table info available.
#19 0x00000000004bcb1b in ?? ()
No symbol table info available.
#20 0x00000000004f4e4c in ?? ()
No symbol table info available.
#21 0x00007fd201402ff7 in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#22 0x00007fd2018ec48d in clone () from /lib/libc.so.6
No symbol table info available.
#23 0x0000000000000000 in ?? ()
No symbol table info available.